Classic texture pack uses some newer textures and sounds.

Video: http://youtube.com/watch?v=zof4n-p1DUI

 

Affected by model:

1. Vex

 

Affected by sound:

1. Doors
2. Trapdoors
3. Buttons
4. Pressure Plates
5. Water
6. Netherrack

 

Affected by texture:

1. Painting
2. Sign GUI
3. Crying Obsidian

Affected by GUI

1. Button selection color